gem scaffold + code extracted from main mustache repo

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in mustache-sinatra.gemspec
+gemspec

LICENSE.txt

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+Copyright (c) 2014 Ricardo Mendes
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -1,4 +1,31 @@
-mustache-sinatra
-================
+# Mustache::Sinatra
 
-Mustache support for Sinatra applications
+TODO: Write a gem description
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'mustache-sinatra'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install mustache-sinatra
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Contributing
+
+1. Fork it ( https://github.com/[my-github-username]/mustache-sinatra/fork )
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create a new Pull Request

Rakefile

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+require "bundler/gem_tasks"
+

lib/mustache/sinatra.rb

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+require "mustache/sinatra/version"
+
+class Mustache
+  # Support for Mustache in your Sinatra app.
+  #
+  #   require 'mustache/sinatra'
+  #
+  #   class Hurl < Sinatra::Base
+  #     register Mustache::Sinatra
+  #
+  #     set :mustache, {
+  #       # Should be the path to your .mustache template files.
+  #       :templates => "path/to/mustache/templates",
+  #
+  #       # Should be the path to your .rb Mustache view files.
+  #       :views => "path/to/mustache/views",
+  #
+  #       # This tells Mustache where to look for the Views module,
+  #       # under which your View classes should live. By default it's
+  #       # the class of your app - in this case `Hurl`. That is, for an :index
+  #       # view Mustache will expect Hurl::Views::Index by default.
+  #       # If our Sinatra::Base subclass was instead Hurl::App,
+  #       # we'd want to do `set :namespace, Hurl::App`
+  #       :namespace => Hurl
+  #     }
+  #
+  #     get '/stats' do
+  #       mustache :stats
+  #     end
+  #   end
+  #
+  # As noted above, Mustache will look for `Hurl::Views::Index` when
+  # `mustache :index` is called.
+  #
+  # If no `Views::Stats` class exists Mustache will render the template
+  # file directly.
+  #
+  # You can indeed use layouts with this library. Where you'd normally
+  # <%= yield %> you instead {{{yield}}} - the body of the subview is
+  # set to the `yield` variable and made available to you.
+  #
+  # If you don't want the Sinatra extension to look up your view class,
+  # maybe because you've already loaded it or you're pulling it in from
+  # a gem, you can hand the `mustache` helper a Mustache subclass directly:
+  #
+  #   # Assuming `class Omnigollum::Login < Mustache`
+  #   get '/login' do
+  #     @title = "Log In"
+  #     require 'lib/omnigollum/views/login'
+  #     mustache Omnigollum::Login
+  #   end
+  #
+  module Sinatra
+    module Helpers
+      # Call this in your Sinatra routes.
+      def mustache(template, options={}, locals={})
+        # Locals can be passed as options under the :locals key.
+        locals.update(options.delete(:locals) || {})
+
+        # Grab any user-defined settings.
+        if settings.respond_to?(:mustache)
+          options = settings.send(:mustache).merge(options)
+        end
+
+        # If they aren't explicitly disabling layouts, try to find
+        # one.
+        if options[:layout] != false
+          # Let the user pass in a layout name.
+          layout_name = options[:layout]
+
+          # If all they said was `true` (or nothing), default to :layout.
+          layout_name = :layout if layout_name == true || !layout_name
+
+          # If they passed a layout name use that.
+          layout = mustache_class(layout_name, options)
+
+          # If it's just an anonymous subclass then don't bother, otherwise
+          # give us a layout instance.
+          if layout.name && layout.name.empty?
+            layout = nil
+          else
+            layout = layout.new
+          end
+        end
+
+        # If instead of a symbol they gave us a Mustache class,
+        # use that for rendering.
+        klass = template if template.is_a?(Class) && template < Mustache
+
+        # Find and cache the view class we want if we don't have
+        # one yet. This ensures the compiled template is cached,
+        # too - no looking up and compiling templates on each page
+        # load.
+        if klass.nil?
+          klass = mustache_class(template, options)
+        end
+
+        # Does the view subclass the layout? If so we'll use the
+        # view to render the layout so you can override layout
+        # methods in your view - tricky.
+        view_subclasses_layout = klass < layout.class if layout
+
+        # Create a new instance for playing with.
+        instance = klass.new
+
+        # Copy instance variables set in Sinatra to the view
+        instance_variables.each do |name|
+          instance.instance_variable_set(name, instance_variable_get(name))
+        end
+
+        # Render with locals.
+        rendered = instance.render(instance.template, locals)
+
+        # Now render the layout with the view we just rendered, if we
+        # need to.
+        if layout && view_subclasses_layout
+          rendered = instance.render(layout.template, :yield => rendered)
+        elsif layout
+          rendered = layout.render(layout.template, :yield => rendered)
+        end
+
+        # That's it.
+        rendered
+      end
+
+      # Returns a View class for a given template name.
+      def mustache_class(template, options = {})
+        @template_cache.fetch(:mustache, template) do
+          compile_mustache(template, options)
+        end
+      end
+
+      # Given a view name and settings, finds and prepares an
+      # appropriate view class for this view.
+      def compile_mustache(view, options = {})
+        options[:templates] ||= settings.views if settings.respond_to?(:views)
+        options[:namespace] ||= self.class
+
+        unless options[:namespace].to_s.include? 'Views'
+          options[:namespace] = options[:namespace].const_get(:Views) rescue Object
+        end
+
+        factory = Class.new(Mustache) do
+          self.view_namespace = options[:namespace]
+          self.view_path      = options[:views]
+        end
+
+        # If we were handed :"positions.atom" or some such as the
+        # template name, we need to remember the extension.
+        if view.to_s.include?('.')
+          view, ext = view.to_s.split('.')
+        end
+
+        # Try to find the view class for a given view, e.g.
+        # :view => Hurl::Views::Index.
+        klass = factory.view_class(view)
+        klass.view_namespace = options[:namespace]
+        klass.view_path      = options[:views]
+
+        # If there is no view class, issue a warning and use the one
+        # we just generated to cache the compiled template.
+        if klass == Mustache
+          warn "No view class found for #{view} in #{factory.view_path}"
+          klass = factory
+
+          # If this is a generic view class make sure we set the
+          # template name as it was given. That is, an anonymous
+          # subclass of Mustache won't know how to find the
+          # "index.mustache" template unless we tell it to.
+          klass.template_name = view.to_s
+        elsif ext
+          # We got an ext (like "atom"), so look for an "Atom" class
+          # under the current View's namespace.
+          #
+          # So if our template was "positions.atom", try to find
+          # Positions::Atom.
+          if klass.const_defined?(ext_class = ext.capitalize)
+            # Found Positions::Atom - set it
+            klass = klass.const_get(ext_class)
+          else
+            # Didn't find Positions::Atom - create it by creating an
+            # anonymous subclass of Positions and setting that to
+            # Positions::Atom.
+            new_class = Class.new(klass)
+            new_class.template_name = "#{view}.#{ext}"
+            klass.const_set(ext_class, new_class)
+            klass = new_class
+          end
+        end
+
+        # Set the template path and return our class.
+        klass.template_path = options[:templates] if options[:templates]
+        klass
+      end
+    end
+
+    # Called when you `register Mustache::Sinatra` in your Sinatra app.
+    def self.registered(app)
+      app.helpers Mustache::Sinatra::Helpers
+    end
+  end
+end
+
+Sinatra.register Mustache::Sinatra

lib/mustache/sinatra/version.rb

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+class Mustache
+  module Sinatra
+    VERSION = "0.1.0"
+  end
+end

mustache-sinatra.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'mustache/sinatra/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "mustache-sinatra"
+  spec.version       = Mustache::Sinatra::VERSION
+  spec.authors       = ["Ricardo Mendes"]
+  spec.email         = ["rokusu@gmail.com"]
+  spec.summary       = %q{TODO: Write a short summary. Required.}
+  spec.description   = %q{TODO: Write a longer description. Optional.}
+  spec.homepage      = ""
+  spec.license       = "MIT"
+
+  spec.files         = `git ls-files -z`.split("\x0")
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ["lib"]
+
+  spec.add_development_dependency "bundler", "~> 1.7"
+  spec.add_development_dependency "rake", "~> 10.0"
+end